Depends on what "it" is.
The surface atmospheric layer is called the troposphere. It contains practically all weather and all habitable environments.
Saturn probably does not have a surface as we know it, because it is made up of gases, which get more dense and hotter closer to the core, but never become a solid, stable surface.
what kind of gases do we use to do a experiment with sound
Gases also have but it is difficult to detect, air (atmosphere) has an outer open surface.
Gases cannot form a free surface on their own. However, gases do have a free surface at the boundary between gas and liquid, such as the free surface of the sea, or the boundary between the liquid of a soft drink and each carbon dioxide bubble rising in it.
Uranus's surface is made of frozen gases
There are hydrogen and helium from the Solar wind. There are also oxygen, sodium and potassium from chemical and radioactive processes on the planet's surface.
No but it usta be but the gases esolved the surface but I my self think there still is but not as much 90 % is mostly is gases .
Gravity holds the gases of the atmosphere near Earth's surface. The force of gravity pulls the gases towards the Earth, preventing them from escaping into space.
gases
Venus has a solid rocky surface.
It all depends on what kind of surface you are trying to find the area for. Each shape has a different formula. Be more specific by saying what kind of shape you are trying to find.